We previously introduced the ability to form cross-realm parties with Real ID friends, and now with Patch 4.3.2, we're adding the ability for players to use that same functionality to form raids to run older normal or heroic raids, or participate in Battlegrounds!
This will allow you to join up with your Real ID friends from other realms and:
Form a cross-realm raid and use Raid Finder.
Jump in to any classic dungeon or raid and be automatically placed in the same instance.
Join forces and dominate the Battlegrounds.
Please note, you will not yet be able to run normal or Heroic Dragon Soul with cross-realm Real ID raids.

Hour of Twilight to hit the European Servers on 30th of November according to mmo-champion. Unless an asteroid hit Blizzard facilities it is 99% sure!
The all new raid Dragon Soul and the protagonist of this expansion Deathwing will be introduced.
The all new feature Raid Finder is here - a cross realm raid grouping for the latest raid - Dragon Soul.
Transmogrification - feature allowing to change the looks of your gear using old gear.
All new Baradin Hold boss - Alizabal and 3 new Heroic Dungeons.

Mists of Pandaria, also known as MoP or Pandaria, will be the fourth expansion pack for World of Warcraft. It was officially announced on October 21, 2011 at BlizzCon 2011.
Mists of Pandaria will raise the level cap from level 85 to 90. It will introduce a new class, Monk, along with the new playable race, Pandaren. The vanity pet system will be overhauled and will include a pet battle system. New PvE scenarios will be introduced, and Challenge Modes will be added for dungeons. The existing 31-point talent trees will be replaced by a new system of tiered talents that are awarded every 15 levels. Blizzard has stated that there are plans for nine new dungeons, three new raids, and four new battlegrounds.